<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" 
               v-for="item of hot" 
               :key="item.id"
               @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" 
			     v-for="( item , key ) of cities" 
					 :key="key"
					 :ref="key"
			>
        <div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" 
					     v-for="innerItem of item"
							 :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
					>
					  {{innerItem.name}}
					</div>
				</div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default {
  name: 'CityList',
	props: {
		hot: Array,
		cities: Object,
		letter: String
	},
  methods: {
    handleCityClick(city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
	watch: {
		letter () {
			if(this.letter) {
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	},
  computed:{
    ...mapState({
      currentCity: 'city'
    })
  },
	mounted () {
		this.scroll = new BScroll(this.$refs.wrapper)
	}
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
		.item-list
		  .item
			  line-height: .76rem
				color: #666
				padding-left: .2rem
				
</style>
